Tuesday, August 31, 2010
The cell phone that recharges itself ...
Technology has made great strides in recent years regarding the development of systems for wireless charging of portable devices. While being able to charge laptops and mobile phones without cables, may seem decades away, it may be closer than you think.
Nokia has recently made some small but important steps in this direction, with the invention of a unique system for wireless charging. The device collects radio waves from the air, which translates into energy that can be used for filling the battery.
And while the "traditional" wireless power systems are designed with a special design to have an integrated transmitter and receiver, it is not quite clear how that system takes the Nokia wireless waves. According to the company, televisions, radios and mobile phones emit waves that spread in the air and that are largely absorbed from the environment. The system of tracks from Nokia collected by these waves and uses the concentrated electromagnetic energy to create electricity. In turn, the electricity generated is used to recharge the battery.
Electromagnetic energy does not produce enough energy to meet the needs of a house, but enough to keep your phone "live".
At present, Nokia is able to obtain 5 milliwatts from the air. The aim is that soon the number will increased to 20 milliwatts and in the future to 50 milliwatts. Even this amount, however, would not be enough to keep the unit active during a call. Despite these efforts, a state stanby will be able to charge the battery cell and theoretically have infinite energy.
Nokia is hoping that this technology will be commercially available within 3-5 years.